I think the Rogue is the fastest hero to level up. Here's how I do it: 1. I send him out on his own to earn some money (to buy a skill or gain free experience). 2. He steals an artifact from level 1 units and tries to defeat them. 3. After reaching level 3 in Stealth, everything starts to improve exponentially: stronger units, more experience, better artifacts. 4. He defeats neutral units, gaining: 100% experience for destroying a unit + 75% experience for Stealth. 175% experience for destroying a unit seems pretty good to me! :smile02: